Help with null reference exception

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Good day all I create an object and then use a method on that object but I think I have an error in my code can anyone assist me

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Pastel.Evolution;
using DD.Library;

public partial class Default4 : System.Web.UI.Page
{


    private Lib.cPastel
          objPastel;

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        objPastel.CreateGRV(648337); getting Null reference exception here  void method only takes an int as an parameter

    }

Posted 29-May-14 21:04pm

mrDivan

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mrDivan 30-May-14 3:35am

Thank you So much after hours of coding sometimes it helps to have an outside view because we miss the small things

2 solutions

Solution 2

Thank you So much after hours of coding sometimes it helps to have an outside view because we miss the small things

Posted 29-May-14 21:35pm

mrDivan

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DamithSL · Accepted Answer · 2014-05-29T21:12:00

you haven't create any instance of objPastel,

C#

//create new instance 
objPastel = new Lib.cPastel();
//then call the method 
objPastel.CreateGRV(648337);

if you creating this instance of cPastel somewhere else in your program and asigning to objPastel , then you better check for null like below

C#

if(objPastel!=null)
{
   objPastel.CreateGRV(648337);
}